<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 表格 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开行 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <!-- 一级权限 -->
            <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="i1 | lev1Class">
              <el-col :span="5" class="h-center">
                <el-tag closable effect="dark" @close="onTagClose(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级三级权限 -->
              <el-col :span="19">
                <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="i2 | lev2Class">
                  <!-- 二级权限 -->
                  <el-col :span="6" class="h-center">
                    <el-tag type="success" closable effect="dark" @close="onTagClose(scope.row, item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" class="tag-lv3" closable effect="dark" @close="onTagClose(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template v-slot="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRole(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightsDialogVisible" width="50%" @close="onSetRightsDialogClose">
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox default-expand-all node-key="id" :default-checked-keys="defaultCheckedKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="setRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="onAddDialogClose">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addNewRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="onEditDialogClose">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editNewRole">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRightsDialogVisible: false,
      rightsList: [],
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      defaultCheckedKeys: [105, 116],
      roleId: '',
      addDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 8, message: '角色名称长度在2~8个字符之间', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 1, max: 15, message: '角色描述长度在1~15个字符之间', trigger: 'blur' }
        ]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 8, message: '角色名称长度在2~8个字符之间', trigger: 'blur' }
        ],
        roleDesc: [
          { required: true, message: '请输入角色描述', trigger: 'blur' },
          { min: 1, max: 15, message: '角色描述长度在1~15个字符之间', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getRolesList()
  },
  filters: {
    // 一级权限的 class 样式
    lev1Class(index) {
      return ['bdtottom', index === 0 ? 'bdtop' : '', 'v-center', 'bdright']
    },
    // 二级权限的 class 样式
    lev2Class(index) {
      return [index === 0 ? '' : 'bdtop', 'v-center', 'pd']
    }
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色列表失败！')
      this.rolesList = res.data
    },
    // tag 关闭的事件
    async onTagClose(row, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') return

      const { data: res } = await this.$http.delete(`roles/${row.id}/rights/${rightId}`)

      if (res.meta.status !== 200) return this.$message.error('删除权限失败！')
      this.$message.success('删除权限成功！')
      row.children = res.data
    },
    // 分配权限
    async showSetRightsDialog(row) {
      this.roleId = row.id
      // 获取权限列表的树形数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) return this.$message.error('获取权限列表数据失败！')

      this.rightsList = res.data
      this.getLeafKeys(row, this.defaultCheckedKeys)

      this.setRightsDialogVisible = true
    },
    // 获取三级权限的 Id
    getLeafKeys(node, arr) {
      if (!node.children) return arr.push(node.id)

      node.children.forEach(x => {
        this.getLeafKeys(x, arr)
      })
    },
    onSetRightsDialogClose() {
      this.defaultCheckedKeys = []
      this.roleId = ''
    },
    async setRights() {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]

      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, {
        rids: keys.join(',')
      })

      if (res.meta.status !== 200) return this.$message.error('分配权限失败！')

      this.$message.success('分配权限成功！')

      this.setRightsDialogVisible = false
      this.getRolesList()
    },
    onAddDialogClose() {
      this.$refs.addFormRef.resetFields()
    },
    addNewRole() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.addForm)

        if (res.meta.status !== 201) return this.$message.error('创建角色失败！')

        this.$message.success('创建角色成功！')
        this.getRolesList()
        this.addDialogVisible = false
      })
    },
    onEditDialogClose() {
      this.editForm = {}
      this.$refs.editFormRef.resetFields()
    },
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('获取角色信息失败！')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editNewRole() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`roles/` + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })

        if (res.meta.status !== 200) return this.$message.error('更新角色失败！')

        this.$message.success('更新角色成功！')
        this.editDialogVisible = false
        this.getRolesList()
      })
    },
    async removeRole(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') return

      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败！')

      this.$message.success('删除角色成功！')
      this.getRolesList()
    }
  }
}
</script>

<style lang="less" scoped>
.bdtop {
  border-top: 1px solid #efefef;
}

.bdtottom {
  border-bottom: 1px solid #efefef;
}

.bdright {
  border-right: 1px solid #efefef;
}

.v-center {
  display: flex;
  align-items: center;
}

.pd {
  padding: 5px 0;
}

.tag-lv3 {
  margin: 5px 10px 5px 0px;
}

.h-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.el-row {
  border-left: 1px solid #efefef;
}

.el-icon-caret-right {
  margin-left: 10px;
}
</style>